Sumire Japanese Keyboard Lite
Sumire Japanese Keyboard Lite is a free, open-source keyboard for Android. Private offline Japanese keyboard with user dictionary and snippets. It has 351 GitHub stars and is released under the MIT license, and you can install it from F-Droid and Google Play.
github.com/KazumaProject/JapaneseKeyboard (opens in a new tab)
- Android
- Kotlin
- Keyboards
- Actively maintained
About Sumire Japanese Keyboard Lite
Sumire is a Japanese keyboard for people who want local-first input and predictable behavior. Typing, conversion, personalization, and learning data stay on the device. The Lite F-Droid build focuses on the core keyboard experience: - kana and romaji input with Japanese candidate conversion - user dictionary and reusable text snippets - clipboard-based helpers and customizable keyboard layouts - emoji and symbol keyboards This flavor excludes the optional Zenz and Gemma model features so it can be distributed on F-Droid with the free-software components needed for everyday typing. The app does not request Internet access.
Privacy and F-Droid
F-Droid builds Sumire Japanese Keyboard Lite from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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What is Sumire Japanese Keyboard Lite?
Sumire Japanese Keyboard Lite is a free, open-source keyboard for Android. Private offline Japanese keyboard with user dictionary and snippets. It has 351 GitHub stars and is released under the MIT license, and you can install it from F-Droid and Google Play.
Is Sumire Japanese Keyboard Lite free and open source?
Yes. Sumire Japanese Keyboard Lite's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install Sumire Japanese Keyboard Lite?
You can install Sumire Japanese Keyboard Lite from F-Droid (package com.kazumaproject.markdownhelperkeyboard.lite.fdroid) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v1.7.128).
Is Sumire Japanese Keyboard Lite still maintained?
The repository's most recent commit was on Oct 7, 2026. Its F-Droid listing was last updated on Oct 6, 2026. appsgit only lists apps whose repository had a commit in the last six months.